=begin pod

=TITLE class utf8

=SUBTITLE Mutable uint8 buffer for utf8 binary data
X<|utf, class>
    class utf8 does Blob[uint8] is repr('VMArray') {}

A C<utf8> is a subtype of Blob which is specifically uint8 data for holding UTF-8
encoded text.

    my utf8 $b = "hello".encode;
    say $b[1].fmt("0x%X"); # OUTPUT: «0x65␤»

=end pod

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